ねじ下穴径148参考資料メートル 並目ねじ ドリル径 メートル 細目ねじ M 1 M 1.1 M 1.2 M 1.4 M 1.6 M 1.8 M 2 M 2.2 M 2.5 M 3 M 3.5 M 4 M 4.5 M 5 M 6 M 7 M 8 M 9 M 10 M 11 M 12 M 14 M 16 M 18 M 20 M 22 M 24 M 27 M 30 M 33 M 36 M 39 M 42 M 45 M 48M 1 × M 1.1 × M 1.2 × M 1.4 × M 1.6 × M 1.8 × M 2 × M 2.2 × M 2.5 × M 3 × M 3.5 × M 4 × M 4.5 × M 5 × M 5.5 × M 6 × M 7 × M 8 × M 9 × M 9 × M 9 × M 10 × M 10 × M 10 × M 11 × M 11 × M 12 × M 12 × M 12 × M 14 × M 14 × M 15 × M 16 × M 16 × 0.75 0.85 0.95 1.1 1.3 1.5 1.6 1.8 2.1 2.5 2.9 3.3 3.8 4.2 5.0 6.0 6.8 7.8 8.5 9.5 10.3 12.0 14.0 15.5 17.5 19.5 21.0 24.0 26.5 29.5 32.0 35.0 37.5 40.5 43.0ドリル径 ユニファイ 並目ねじ 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.35 0.35 0.35 0.5 0.5 0.5 0.5 0.75 0.75 0.1 0.75 1 0.75 1.25 1 0.75 1 0.75 1.5 1.25 1 1.5 1 1.5 1 1.5 No.1- 64 UNC No.2- 56 UNC No.3- 48 UNC No.4- 40 UNC No.5- 40 UNC No.6- 32 UNC No.8- 32 UNC No.10- 24 UNC No.12- 24 UNC 1/4- 20 UNC 5/16- 18 UNC 3/18- 16 UNC 7/16- 14 UNC 1/2- 13 UNC 9/16- 18 UNC 5/8- 11 UNC 3/4- 10 UNC 1/8- 9 UNC 1 - 8 UNC 1 1/8- 7 UNC 1 1/4- 7 UNC 1 3/8- 6 UNC 1 1/2- 6 UNC 1 3/4- 5 UNC 2 - 4.5 UNC 2 1/4- 4.5 UNC 2 1/2- 4 UNC 2 3/4 4 UNC 3 - 4 UNC 3 1/4- 4 UNC 3 1/2- 4 UNC 3 3/4- 4 UNC 4 - 4 UNC0.8 0.9 1.0 1.2 1.4 1.6 1.75 1.95 2.2 2.7 3.2 3.5 4.0 4.5 5.0 5.3 6.3 7.0 7.3 8.0 8.3 8.8 9.0 9.3 10.0 10.3 10.5 10.8 11.0 12.5 13.0 13.5 14.0 14.5 ドリル径 ユニファイ 細目ねじ No.0- 80 UNF No.1- 72 UNF No.2- 64 UNF No.3- 56 UNF No.4- 48 UNF No.5- 44 UNF No.6- 40 UNF No.8- 36 UNF No.10- 32 UNF No.12- 28 UNF 1/4- 28 UNF 5/16- 24 UNF 3/8- 24 UNF 7/16- 20 UNF 1/2- 20 UNF 9/16- 18 UNF 5/8- 18 UNF 3/4- 16 UNF 7/8- 14 UNF 7/8- 18 UNF 1 1/8- 12 UNF 1 1/4- 12 UNF 1 3/8- 12 UNF 1 1/2- 12 UNF1.5 1.8 2.1 2.3 2.6 2.8 3.4 3.8 4.5 5.1 6.6 8.0 9.3 10.8 12.2 13.5 16.5 19.5 22.0 25.0 28.0 30.5 33.5 39.0 45.0 51.0 57.0 63.0 69.5 76.0 82.0 89.0 95.0ドリル径 1.2 1.5 1.8 2.1 2.4 2.7 2.9 3.5 4.1 4.6 5.5 6.9 8.5 9.8 11.4 12.8 14.5 17.5 20.4 23.2 26.5 29.5 32.7 36.0ねじ下穴径
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